<template>
	<view class="login-container">
		<!-- 提示登录的图标 -->
		<uni-icons type="contact-filled" size="100" color="#AFAFAF"></uni-icons>
		<!-- 登录按钮 -->
		<button type="primary" class="btn-login" open-type="getUserInfo" @getuserinfo="getUserInfo">一键登录</button>
		<!-- 登录提示 -->
		<view class="tips-text">登录后尽享更多权益</view>
	</view>
</template>

<script>
	import {
		mapState,
		mapMutations
	} from "vuex";
	export default {
		name: "my-login",
		computed: {
			...mapState('m_user', ['redirectInfo'])
		},
		data() {
			return {

			};
		},
		methods: {
			...mapMutations('m_user', ['updateUserInfo', 'updateToken', 'updateRedirectionInfo']),
			//获取微信用户的基本信息
			getUserInfo(e) {
				//判断是否获取用户信息成功
				if (e.detail.errMsg === 'getUserInfo:fail auth deny') return uni.$showMsg('您取消了登录授权！')
				//获取用户信息成功，e.detail.userInfo就是用户信息的基本信息
				console.log(e.detail)
				this.updateUserInfo(e.detail.userInfo)
				//获取登录成功后的token信息
				this.getToken(e.detail)
			},
			//获取用户的token信息
			async getToken(info) {
				const res = await uni.login().catch(err => err)
				console.log(res)
				//判断是否wx.login()调用失败
				if (res.errMsg !== 'login:ok') return uni.$showError('登录失败！')

				//准备参数对象
				const query = {
					code: res.code,
					encryptedData: info.encryptedData,
					iv: info.iv,
					rawData: info.rawData,
					signature: info.signature
				}
				console.log(query)
				
				//换取token
				const loginResult = await uni.$http.post('/api/public/v1/users/wxlogin', query)
				console.log(loginResult)
				//目前掉不通，先设置为默认值
				// if(loginResult.meta.status !== 200 ) return uni.$showMsg('登录失败！')
				uni.$showMsg('登录成功！')
				this.updateToken('MmxaRjZhdVR1VGc3eU5yazZSY+')
				//获取token后返回到之前的页面
				this.navigateBack()
			},
			//返回之前登录的页面
			navigateBack() {
				console.log("我是login页面的导航回退操作！")
				//redirectInfo不为null时，并且导航方式为switchBar时
				if (this.redirectInfo !== null && this.redirectInfo.openType === 'switchTab') {
					console.log(this.redirectInfo)
					uni.switchTab({
						//去到要导航的页面地址
						url: this.redirectInfo.from,
						complete: () => {
							this.updateRedirectionInfo(null)
						}
					})
				}
			}
		},
	}
</script>

<style lang="scss">
	.login-container {
		//登录盒子的样式
		height: 750rpx;
		display: flex;
		flex-direction: column;
		align-items: center;
		justify-content: center;
		background-color: #f8f8f8;
		position: relative;
		overflow: hidden;

		//绘制登录盒子底部的半椭圆造型
		&::after {
			content: ' ';
			display: block;
			position: absolute;
			width: 100%;
			height: 40px;
			left: 0;
			bottom: 0;
			background-color: white;
			border-radius: 100%;
			transform: translateY(50%);
		}

		//登录按钮的样式
		.btn-login {
			width: 90%;
			border-radius: 100px;
			margin: 15px 0;
			background-color: #c00000;
		}

		//按钮下方提示消息的样式
		.tip-text {
			font-size: 12px;
			color: gray;
		}
	}
</style>